Make kowidgets kdelibs4support-free

This breaks komain, which is now unported again...

CCMAIL:calligra-devel@kde.org

There is also a big todo left for the resourceserverprovider.
QStandardPaths and KStandardDirs have one really big difference:
KStandardDirs allows you to define a resource type and add different
locations to look for those resources, QStandardPaths doesn't.

The porting guide says to simply look in all those places when
using QStandardPaths::locate, but that doesn't work, of course, for
us, because our resource loading code is all generic.

So this needs thought...